Recombinant Human IL-21 Protein

Formulations:
Catalog # Availability Size / Price Qty
8879-IL-010
8879-IL-050
Recombinant Human IL-21 Protein Bioactivity
1 Image
Product Details
Citations (9)
FAQs
Reviews (1)

Recombinant Human IL-21 Protein Summary

Purity
>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
Endotoxin Level
<0.10 EU per 1 μg of the protein by the LAL method.
Activity
Measured by its ability to enhance IFN-gamma secretion in NK-92 human natural killer lymphoma cells. The ED50 for this effect is ≤ 8 ng/mL.
Source
E. coli-derived human IL-21 protein
Gln25-Ser155, with a N-terminal Met
Accession #
N-terminal Sequence
Analysis
Met
Predicted Molecular Mass
15 kDa
SDS-PAGE
17 kDa, reducing conditions

Product Datasheets

Carrier Free

What does CF mean?

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.

What formulation is right for me?

In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.

8879-IL

Formulation Lyophilized from a 0.2 μm filtered solution in PBS with BSA as a carrier protein.
Reconstitution Reconstitute at 100 μg/mL in PBS containing at least 0.1% human or bovine serum albumin.
Shipping The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage:
  • 12 months from date of receipt, ≤ -20 °C as supplied.
  • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
  • 3 months, ≤ -20 °C under sterile conditions after reconstitution.

8879-IL/CF

Formulation Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose.
Reconstitution Reconstitute at 100 μg/mL in PBS.
Shipping The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage:
  • 12 months from date of receipt, ≤ -20 °C as supplied.
  • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
  • 3 months, ≤ -20 °C under sterile conditions after reconstitution.

Data Image

Bioactivity Recombinant Human IL-21 Protein Bioactivity View Larger

Recombinant Human IL-21 (Catalog # 8879-IL) enhances IFN-gamma secretion in NK-92 human natural killer lymphoma cells. TheED50 for this effect is ≤ 8 ng/mL.

Reconstitution Calculator

Reconstitution Calculator

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Background: IL-21

Interleukin-21 (IL-21) is an approximately 14 kDa four-helix-bundle member of the family of cytokines that utilize the common gamma chain ( gamma c) as a receptor subunit. gamma c is also a subunit of the receptors for IL-2, IL-4, IL-7, IL-9, and IL-15 (1). IL-21 is produced by activated T follicular helper cells (Tfh), Th17 cells, and NKT cells (2-6). It exerts its biological effects through a heterodimeric receptor complex of gamma c and the IL-21-specific IL-21 R (2, 7). Tfh-derived IL-21 plays an important role in the development of humoral immunity through its autocrine effects on the Tfh cell and paracrine effects on immunoglobulin affinity maturation, plasma cell differentiation, and B cell memory responses (4, 8, 9). It is also required for the migration of dendritic cells to draining lymph nodes (10). IL-21 regulates several aspects of T cell function. It co-stimulates the activation, proliferation, and survival of CD8+ T cells and NKT cells and promotes Th17 cell polarization (3, 5, 6, 11, 12). It blocks the generation of regulatory T cells and their suppressive effects on CD4+ T cells (13, 14). IL-21 R engagement enhances the cytolytic activity and IFN-gamma production of activated NK cells but limits the expansion of resting NK cells (15). In addition, IL-21 suppresses cutaneous hypersensitivity reactions by limiting allergen-specific IgE production and mast cell degranulation (16). Dysregulation of the IL-21/IL-21 R system contributes to the development of multiple immunological disorders (1, 17). The 133 amino acid (aa) mature human IL-21 shares 63% and 61% aa sequence identity with mouse and rat IL-21, respectively. Alternative splicing generates an additional isoform with a substitution of the C-terminal 16 amino acids (18).

References
  1. Tangye, S.G. (2015) Curr. Opin. Immunol. 34:107.
  2. Parrish-Novak, et al. (2000) Nature 408:57.
  3. Coquet, J.M. et al. (2007) J. Immunol. 178:2827.
  4. Vogelzang, A. et al. (2008) Immunity 29:127.
  5. Korn, T. et al. (2007) Nature 448:484.
  6. Nurieva, R. et al. (2007) Nature 448:480.
  7. Asao, H. et al. (2001) J. Immunol. 167:1.
  8. Zotos, D. et al. (2010) J. Exp. Med. 207:365.
  9. Rankin, A.L. et al. (2011) J. Immunol. 186:667.
  10. Jin, H. et al. (2009) J. Clin. Invest. 119:47.
  11. Frohlich, A. et al. (2009) Science 324:1576.
  12. Yi, J.S., et al. (2009) Science 324:1572.
  13. Peluso, I. et al. (2007) J. Immunol. 178:732.
  14. Bucher, C. et al. (2009) Blood 114:5375.
  15. Kasaian, M.T. et al. (2002) Immunity 16:559.
  16. Tamagawa-Mineoka, R. et al. (2011) J. Invest. Dermatol. 131:1513.
  17. Ma, J. et al. (2011) Cytokine 56:133.
  18. Rahman, M. et al. (2007) FEBS Lett. 581:4001.
Long Name
Interleukin 21
Entrez Gene IDs
59067 (Human); 60505 (Mouse); 365769 (Rat); 442935 (Canine); 100344172 (Rabbit)
Alternate Names
IL21; IL-21; IL-21Za11interleukin-21; interleukin 21; interleukin-21 isoform

Citations for Recombinant Human IL-21 Protein

R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

9 Citations: Showing 1 - 9
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  1. Aberrant expression of NKL homeobox gene HLX in Hodgkin lymphoma
    Authors: S Nagel, C Pommerenke, C Meyer, M Kaufmann, RAF MacLeod, HG Drexler
    Oncotarget, 2018;9(18):14338-14353.
    Species: Human
    Sample Types: Whole Cells
    Applications: Bioassay
  2. Effective screening of T cells recognizing neoantigens and construction of T-cell receptor-engineered T cells
    Authors: T Kato, T Matsuda, Y Ikeda, JH Park, M Leisegang, S Yoshimura, T Hikichi, M Harada, M Zewde, S Sato, K Hasegawa, K Kiyotani, Y Nakamura
    Oncotarget, 2018;9(13):11009-11019.
    Species: Human
    Sample Types: Whole Cells
    Applications: Bioassay
  3. The KDM4A/KDM4C/NF-?B and WDR5 epigenetic cascade regulates the activation of B cells
    Authors: KH Hung, YH Woo, IY Lin, CH Liu, LC Wang, HY Chen, BL Chiang, KI Lin
    Nucleic Acids Res., 2018;0(0):.
    Species: Human
    Sample Types: Whole Cells
    Applications: Bioassay
  4. The transcriptional coactivator TAZ regulates reciprocal differentiation of TH17 cells and Treg cells
    Authors: J Geng, S Yu, H Zhao, X Sun, X Li, P Wang, X Xiong, L Hong, C Xie, J Gao, Y Shi, J Peng, RL Johnson, N Xiao, L Lu, J Han, D Zhou, L Chen
    Nat. Immunol., 2017;0(0):.
    Species: Human
    Sample Types: Whole Cells
    Applications: Bioassay
  5. Rad52 competes with Ku70/Ku86 for binding to S-region DSB ends to modulate antibody class-switch DNA recombination
    Authors: H Zan, C Tat, Z Qiu, JR Taylor, JA Guerrero, T Shen, P Casali
    Nat Commun, 2017;8(0):14244.
    Species: Human
    Sample Types: Whole Cells
    Applications: Bioassay
  6. The small FOXP1 isoform predominantly expressed in activated B cell-like diffuse large B-cell lymphoma and full length FOXP1 exert similar oncogenic and transcriptional activity in human B cells
    Haematologica, 2016;0(0):.
    Species: Human
    Sample Types: Whole Cells
    Applications: Bioassay
  7. Developing in vitro expanded CD45RA+ regulatory T cells as an adoptive cell therapy for Crohn's disease
    Authors: James B Canavan
    Gut, 2016;65(4):584-94.
    Species: Human
    Sample Types: Whole Cells
    Applications: Bioassay
  8. Decreased RORC-dependent silencing of prostaglandin receptor EP2 induces autoimmune Th17 cells.
    Authors: Kofler D, Marson A, Dominguez-Villar M, Xiao S, Kuchroo V, Hafler D
    J Clin Invest, 2014;124(6):2513-22.
    Species: Human
    Sample Types: Whole Cells
    Applications: Bioassay
  9. Eosinophils regulate peripheral B cell numbers in both mice and humans.
    Authors: Wong, Tina W, Doyle, Alfred D, Lee, James J, Jelinek, Diane F
    J Immunol, 2014;192(8):3548-58.
    Species: Human
    Sample Types: Whole Cells
    Applications: Bioassay

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Recombinant Human IL-21 Protein
By Anonymous on 09/27/2018
Application: In vitro bioactivity in cell culture